CN100523864C - Doppler radar for detecting tire anomalies - Google Patents
Doppler radar for detecting tire anomalies Download PDFInfo
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- CN100523864C CN100523864C CNB2004100985387A CN200410098538A CN100523864C CN 100523864 C CN100523864 C CN 100523864C CN B2004100985387 A CNB2004100985387 A CN B2004100985387A CN 200410098538 A CN200410098538 A CN 200410098538A CN 100523864 C CN100523864 C CN 100523864C
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/24—Wear-indicating arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C19/00—Tyre parts or constructions not otherwise provided for
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
- G01M17/027—Tyres using light, e.g. infrared, ultraviolet or holographic techniques
Abstract
The present subject matter generally concerns the detection of tire related anomalies in a pneumatic tire using Doppler Micro-Power Impulse Radar technology together with radar signal analyzation methodologies. More particularly, the present disclosure relates to methods and apparatus for the detection of anomalies in pneumatic tires including tread separation, tread wear, uneven tread wear, tire balance and foreign body detection. The signal analysis used differentiates various of the detectable anomalies by analyzing the radar signals based on ranges of harmonics.
Description
Technical field
[0001] in general, theme of the present invention relates to and uses the radar Doppler technology unusual and/or performance detects to pneumatic tyre.More particularly, the disclosure of invention relates to the method and apparatus that is used to carry out the pneumatic tyre abnormality detection, above-mentioned abnormality detection includes but not limited to use Doppler's micropower impulse radar (Micro-PowerImpulse Radar, the detection of the tyre surface separation of MIR) carrying out, treadwear, inhomogeneous treadwear, wheel balance and foreign matter etc.
Background technology
[0002] the air tread circumferential belt layer separate be known, have a proemial problem.Under-inflation, overload and travelling under the weather conditions of sweltering heat can cause tire to produce the tread rings belt separating.The tread rings belt separates also may to come across to be made improper or makes (that is, usually said tyre rebuilding) more improperly among the tire.Under the situation that tyre surface separates from pneumatic tyre during running at high speed especially during use, the tread rings belt separates has great negative effect for vehicle operation.Present technique has been described equipment and the method that is used to detect this situation and other situations, so that can be to alarm driver when running into these situations.
[0003] in order during use tire to be monitored, to detect physical presence as possible or to be about to the fault that produces and to warn the driver to have above-mentioned fault, so that take preventive measures, people have made many effort for this reason.U.S. Patent number 5,436,612 (
Aduddell) a kind of this type of trial has been described, it relates to places a plurality of microphones and radar transmitter on the diverse location of truck.Transmitter is to being positioned at the other receiver emission sound wave of driver, and this sound wave is detected by different microphones.In this way, the driver can hear any unusual sound, and if hear and can adopt appropriate measures unusual sound.
[0004] United States Patent (USP) 6,255,940 (
People such as Phelan) a kind of liner having been described, can it be installed in the tire by the interior face (innerliner) that this liner is fixed on tire.Above-mentioned liner supports the sensor of monitor temperature and pressure, can give a warning to the driver of this vehicle when detecting abnormal conditions.United States Patent (USP) 4,570,152 (
People such as Melton) another kind of tyre temperature detection technique disclosed.In this patent, in tire body, imbed some permanent magnets.The excessive heat that produces in the tyre rotation will cause the variation of magnetic field of permanent magnet.These change detected and are used to produce alarm to alarm driver.
[0005] and another kind is used to monitor tire, be particularly useful for monitoring prior art that tyre surface separates at United States Patent (USP) 6,028,508 (
Mason) in to some extent the instruction.No. 508 patent disclosures of Mason a kind of system that uses range measurement system, in this range measurement system, use the sensor of transmitter and receiver combination to be used to detect distance from sensor to monitored surface of tyre.If its distance that is set to from the sensor to the surface of tyre surpasses predetermined value, will send warning.
[0006] another kind is used to monitor airtyred prior art and has also instructed at U.S. Patent Application Publication US 2002/0189336 AL (McEwan).McEwan discloses the modes of emplacement of radar sensor with respect to airtyred diverse location, to monitor dissimilar abnormal tyres.For example, McEwan discloses by station keeping radar equipment irradiation tire tread tangent line and has partly detected the tyre surface loss, so that just will there be a large amount of detectable signal attenuations in firm generation tire wear in radar echo signal.McEwan also discloses the foreign matter that thrusts tire tread and has detected, by to the radar equipment location with irradiation tire tangent line part, and check radar echo signal by relatively average amplitude and peak value, realize that the foreign matter that thrusts tire tread detects.By in other correlation properties of diverse location station keeping radar Equipment Inspection tire or unusual, for example can detect the characteristic of limit wall portion, and can detect rotating speed such as spoke or opening that tire is installed in the wheel by the irradiation of station keeping radar system by station keeping radar equipment irradiation limit wall portion.
[0007] although in tire fault and resist technology field, various aspects and optional feature are known, do not occur as yet a kind ofly can generally being incorporated into all the desirable features of this discussion and the design of operating characteristic.
[0008] except the document of in instructions, having quoted, the Science that exemplary background document is included in January, 1996/publishes February; Among the Technology Review, its title be " Micropower Impulse Radar " (micropower impulse radar, MIR).All the elements of all above-mentioned U.S. Patent Publications conduct in this application is in conjunction with reference.
Summary of the invention
[0009] the present invention recognize and be devoted in the past various defectives and other relate to the particular aspects of tire fault and resist technology, especially abnormal tyre detects.Therefore, generally, the aspect of some embodiments of disclosure technology relates to improving equipment and correlation method of being provided for that abnormal tyre detects.Specifically, the particular aspects of some embodiments of public technology relates to a kind of MIR of use technology provides improving equipment and correlation method of abnormal tyre indication and measurement.
[0010] another aspect of particular of the present invention will provide a kind of initial separation of detection wheel tire tread unusual improve equipment and correlation method relevant with tire with other that be used for, above-mentioned other unusually include but not limited to relevant with tire: treadwear, inhomogeneous treadwear, wheel balance and location, and the tire foreign matter pierces through etc.
[0011] the further aspect of embodiments more of the present invention will be provided for a kind of the improving equipment and correlation method that the tire relevant abnormalities detects, above-mentioned abnormality detection does not need any special feature of tire self, and this special feature is for example previously mentioned
Melton etc.No. 152 patents in implantation magnetic field or previously mentioned
Phelan etc.No. 940 patents in the pad have sensor is installed.
[0012] some embodiments of disclosure technology further will provide a kind of improving equipment and correlation method of tire relevant abnormalities detection that be used in the aspect, this improve equipment and method can realize on any pneumatic tyre do not need to provide the extra sensor that is installed on the tire.
[0013] the further aspect of some embodiments of disclosure technology will provide a kind of and uses single, fixation of sensor to realize improving equipment and correlation method of a plurality of tire correlation properties and abnormality detection.
[0014] other aspect and the advantage of the present invention set forth in detailed description of the present invention, or these aspects and advantage are conspicuous for those of ordinary skill in the art from detailed description of the present invention.Those of ordinary skill in the art also should further understand according to existing list of references, under the situation that does not depart from spirit and scope of the invention, can make amendment and change feature, the step of specific description, reference and the discussion of this clearly demarcated each embodiment and purposes.This variation can comprise these are known, reference or discuss the equality unit and the replacement of feature, material or step, and function, conversion operation or the position of various parts, feature, step etc.
[0015] further, be to be understood that different embodiments of the present invention and current different preferred embodiments can comprise feature of the present invention, step, or parts, or the multiple combination or the configuration of their equivalent (comprise in the drawings clearly showing, or the combination of the feature that in detailed description, does not offer some clarification on or step or its configuration).
[0016] first kind of exemplary embodiment of the present invention relates to a kind of improving equipment and correlation method of tire relevant abnormalities detection that be used for, and it uses MIR check-up tread surface and each layer below the tread to assembling airtyred vehicle.
[0017] a kind of more specifically exemplary embodiment of present technique relates to a kind of be used to the detect initial separation of air tread and improving equipment and correlation method of other tire relevant abnormalities, in above-mentioned detection, Doppler Lidar System uses with appropriate signals disposal system and method.
[0018] other embodiments of the technology of the present invention needn't be stated by the overview section here the feature that relates in the overview section above it can comprise and merge, parts, or step, and/or the feature of discussing among the application, part, or the combination of each side such as step.
[0019] recall all the other contents in the instructions, those of ordinary skills will understand the feature and the aspect of these and other embodiment better.
Description of drawings
[0020] proposed the explanation of enforcement complete, that be enough to certificate of the present invention in the instructions of the present invention, it comprises the optimal mode that instructs those of ordinary skills, and this instructions is by describing with reference to the accompanying drawings.In the accompanying drawings:
[0021] Figure 1 shows that an exemplary airtyred viewgraph of cross-section, and possible tyre surface separate areas has been described;
[0022] Figure 2 shows that similar exemplary airtyred viewgraph of cross-section, the delamination area of belt shown in it and according to the checkout equipment of present technique;
[0023] Figure 3 shows that the figure that is used to represent the exemplary output voltage data of Doppler's micropower impulse radar equipment;
[0024] Figure 4 shows that exemplary frequency analysis figure according to Fig. 3 graph data;
[0025] Figure 5 shows that the exemplary graphical output voltage data of Doppler's micropower impulse radar equipment, these data are the mean value during 15 rotations of tire;
[0026] Figure 6 shows that exemplary frequency analysis figure according to Fig. 5 graph data; And
[0027] Fig. 7 provides the exemplary analysis result that is used to illustrate this method effect.
[0028] reusable Reference numeral is used for expression identical or similar feature of invention or parts in this instructions and accompanying drawing.
Embodiment
[0029] with top summary of the invention partly mention the same, the present invention is devoted to a kind of being used for the improving equipment and correlation method of the pneumatic tyre unusual detection relevant with tire, and Doppler Lidar System and appropriate signals disposal system and method are used together in above-mentioned detection.
[0030] Figure 1 shows that the exemplary viewgraph of cross-section of pneumatic tyre 1.Pneumatic tyre 1 is by tread block part 2, sidewall sections 5, and bead part 6, tyre bead 4 and circumferential belt layer part 7 are formed.As following illustrated concrete like that, Fig. 1 also shows the general area 3 that the tyre surface separation may take place.
[0031] Figure 2 shows that another exemplary viewgraph of cross-section of pneumatic tyre 1.Tire 1 shown in Fig. 2 comprises all parts of the tire of describing among Fig. 11, but stressed parts 3 slightly different in the tire ', may separate by the initial ring belt there.Also show the exemplary representative equipment of realizing according to present technique that is used to detect tire 1 internal abnormality among Fig. 2.As figure, shown the radar Doppler unit of forming by micropower impulse radar (MIR) Transmit-Receive Unit 8 and directional antenna 9 among the figure.The electric signal that is coupled to signal processing unit 11 and signal processing unit 11 from the electric signal of MIR8 is coupled to signal application device 12, will illustrate in greater detail these two unit subsequently.
[0032] as shown in Figure 2, the antenna 9 of radar Doppler unit 8 points to the outside tread contour zone 10 of tire 1, and shines above-mentioned zone 10 when work.When surface of tyre or subsurface circumferential belt layer during near radar Doppler unit 8, radar Doppler unit 8 and signal processing unit 11 are worked together to detect the rapid variation of their speed.The electric signal that is produced by radar Doppler unit 8 and the radial velocity of surface of tyre and the radial velocity of the circumferential belt layer under the surface of tyre are directly proportional.
[0033], is necessary the brief description notion of " separation of tread rings belt " once in order to further specify the mode of operation of present technique.It is the phenomenon of the separation of pierce tap from airtyred tyre surface is sealed that the tread rings belt separates.The tread rings belt separate be from rubber and metal in conjunction with the initial point of weakness, tear then.The bending that these initial points cause along with the aging and local heating of rubber for tire and increasing.The increase of initial point is relevant with the formation of vesica.Along with the development that the tread rings belt separates, these vesicas are grown up and are merged.Use known laser shear interference (shearography) technology, can measure the tread rings belt and separate.A kind ofly be used to measure exemplary laser shear interference technology that inner tube of pneumatic tyre face circumferential belt layer separates and comprise tire to be tested is placed in the pressure chamber.Under normal pressure, for example use ccd video camera to treat the testing tire imaging and image is deposited in the storer.From the pressure chamber, extract and treat air out the testing tire reimaging then.Air vesica in the tire promptly, shows the position that the tread rings belt separates, and reduces to expand and cause squeegee action owing to the outer surface of tire air pressure.Use electronic device from memory image, to deduct the image of under the squeegee action state, taking, and show the error image that obtains.These images that are shown are presented on the monitor with the interference fringe form, thereby have shown the situation that the tire tread circumferential belt layer separates.Although clearly this method of testing is effective, be not suitable for fully being used on the vehicle of motion, but disclosed the same with present technique, it provides a kind of useful non-destructive technology that is used for the comparison/affirmation of tread rings belt separation detection really.
[0034] as mentioned above, present technique comprises the beginning of using Doppler's micropower impulse radar (MIR) Transmit-Receive Unit 8 to separate with detection tread rings belt.Comprise the product that radar Doppler Transmit-Receive Unit that front McEwan patented claim is described in open or any other can obtain by commercial sources according to the instantiation of the Doppler MIR of technology disclosed by the invention.As previously mentioned, present technique is used signal processor processes or is analyzed the signal that MIR equipment produces, to detect beginning and other tire relevant abnormalities that the tread rings belt separates.For this notion is described, please refer to Fig. 3, the exemplary figure of MIR output voltage data during the figure illustrates testing tire and once rotating.By using a kind of and similar laser shear interference of aforementioned techniques technology to measure, this specific testing tire does not have tangible tire belt to separate.In the test of using according to present technique, (Discrete Fourier Transform, frequency analysis DFT) is analyzed the graphical data among Fig. 3 in order to determine to exist the tread rings belt to separate in the tire, use to have discrete Fourier transform (DFT).In order to realize above-mentioned analysis, must know number of samples corresponding to given rotation.With reference to figure 3 and Fig. 4, adopt known sampling frequency, for instance, 40,000 samples/sec, the number of samples in can obtaining to rotate and can use normal scatter Fourier transform (DFT) to do analysis.The result of this processing can be drawn into figure, and as shown in Figure 4.The voltage signal that " energy " representative is obtained from MIR among Fig. 4 square, and it can be represented with any measurement unit.Therefore, Fig. 4 has represented the relativity of " energy " (measurement unit arbitrarily) and harmonic wave, and above-mentioned harmonic wave is based on tire rotational speed in the test.
[0035] analyze like Fig. 5 and Fig. 6 representation class, the mean value of 15 rotations of tire when data representation wherein shown in Figure 5 is tested, and diagrammatic representation among Fig. 6 and the similar analysis result of Fig. 4, but the data of using are from Fig. 5.
[0036] for identification tread rings belt from Fig. 4 and derivation energy spectrum shown in Figure 6 separates and other abnormal tyres, can use following technology.At first, the average energy E of harmonic energy spectrum
AvCan use following formula to calculate:
And the barycenter CM of Harmonic Distribution can be calculated as follows:
E wherein
iBe i energy component of harmonic spectrum, and N is a number of samples.
[0037] someone expects that the calculated value of equation 1 increases and the calculated value of equation 2 reduces.In order to test these expections, the same with the detection of laser shear interference, some are had tire (the tire A-D) test of different tread rings belt fractional doses.Fig. 7 has described the barycenter of energy distribution in these tire Harmonic Distribution and the relation curve of average energy (measurement unit arbitrarily).Tire A tread rings belt fractional dose minimum, and tire D tread rings belt fractional dose maximum.Compare with the effectiveness of spininess more, with the effectiveness of these two values be: CM and E the dedicated algorithms of particular harmonic
AvThe overall performance that stands the tire that the tread rings belt separates with all is relevant, rather than and basically with tyre type, size, and even test condition and the value that changes is relevant.Can carry out some further modifications to the basic test algorithm.First modification must reduce to be shown to from two dimension shown in Figure 7 the tolerance of one-dimensional measurement.Realize that a kind of mode that above-mentioned tolerance reduces is to use ratio:
Because when can and use equation 3 in detecting, the value that should transmit tire does not have priori, so should use initial measurement that equation 3 is carried out normalization.Under the situation of many Tire testings, can measure the G value of tire A, be used as the normalization factor G of tire B, C, D then
0For the evolution test that the tread rings belt separates, can measure the initial value of new tire and the normalization that this value is used for all follow-up measurements.That is to say that j meter readings is:
G wherein
0It is initial measurement meter reading.In most of the cases first meter readings is in the tire of perfect condition with representative, and as the reference of all succeeding states.Use normalization to realize two things: the first, the variation that the radar power and bit that must consider when it has eliminated the belt separation of use Doppler micropower impulse radar (MIR) measurement tread rings or other abnormal tyres is put.The second, the professional knowledge of the specific tires of using when it does not need to possess about test, that is, what kind of the possible vehicle effect of energy level and CM seal with to(for) specific tyre surface be.
[0038] another kind that can carry out fundamental measurement is revised the improvement that relates to time base stability and average.Vehicle will produce sizable noise in incomplete smooth travels down.This noise may stem from comprise MIR on vehicle the installation site and the relatively independent motion of vehicle tyre in interior multiple source.Therefore, As time goes on, this relative motion has produced moving of some, and this will produce voltage noise in any system based on Doppler.The appearance of big amplitude noise need be carried out filtering to sampled signal.In the most basic filtering method, base is averaged in the time of can using signal simple, for instance, carries out this algorithm when gathering Fig. 5 and data shown in Figure 6, needs stable time base but great amount of samples averaged.
[0039] in the process of the various indexs that assessment tread rings belt separates, carries out some tests.A kind of tread rings belt that comprises in these tests separates the research that develops, and when it attempts to form the separation of tread rings belt in the tire that originally is new tire, discerns this tread rings belt and separates.Separate in the process that develops test at the tread rings belt, can affirm that there are some other influences that can obscure tread rings belt separating and measuring in the there.In these influences first is uneven wearing and tearing.During tread rings belt discrete testing, a uneven wear that begins to form certain degree in the testing tire does not separate but also produce the tread rings belt.It should be noted that and use identical being used to measure the measuring technique that the tread rings belt separates, the development of uneven wearing and tearing is separating analogous with the tread rings belt basically.On the other hand, should be noted that the variation of Harmonic Distribution barycenter (CM) does not have average energy to change soon when uneven wearing and tearing become serious more.This just makes that measuring equation (equation 3) is modified to:
Really reduce as if average energy reduced uneven wearing and tearing to the influence of measured value measurement sensitivity.Find that according to further test not only tread rings belt separation detector is responsive to uneven wearing and tearing, and it is also very responsive to treadwear.Although it has a clear superiority on the measurement treadwear, it has pointed out to follow the possible problem of tread rings belt separating and measuring.Because measure the increase of dependence average energy and the skew of harmonic wave CM,, might cause the misregister that the tread rings belt is separated for the indiscreet selection of harmonic wave to be analyzed.
[0040] influence of having pointed out has shown necessity of windowing, and windowing here means by selecting to wait to study the scope of harmonic wave, interested various different phenomenons are analyzed.For example, by using the harmonic wave of said method research in from the 3rd harmonic wave to n harmonic wave scope, can measure separation of tread rings belt and uneven wearing and tearing, n is the first-harmonic about tread contour here.By the harmonic wave in selecting from n harmonic wave to m harmonic wave scope and measure average energy, treadwear that can the analytical test tire, m is the higher hamonic wave of tread contour energy here.By observing harmonic wave 1 and harmonic wave 2, can study wheel balance and location.In an exemplary embodiment, n can be the 60th harmonic wave, and m can be the 120th harmonic wave.Use the windowing method according to the harmonic wave scope, this ability of the belt separation of identification tread rings or other abnormal tyres shows the correlativity of piecewise function as follows:
Here f (CM
j), g (E
Avi), l (CM
j) and m (E
Avi) be the function of rule of thumb determining, it provides enough measurement ranges, and can rule of thumb determine weighting function, to provide enough sensitivity to the research phenomenon.In equation 6, a is the appropriate real-valued constants of selecting with correct differentiation state of needs because according to observations, for the different value of barycenter, can be desirably in different phenomenons develop in difference to some extent.The piecewise function of definition provides the template that is used for many functions in the equation 6, and these functions can be used in measures the separation of tread rings belt, treadwear and uneven wearing and tearing, and they are carried out appropriate identification.
[0041] thereby; a kind of equipment and method, the especially a kind of equipment of micropower impulse radar and signal analysis technology and method used that is used to detect the tire relevant abnormalities is described at this, above-mentioned signal analysis technology comprises the basis of harmonic wave scope as the particular type that detects abnormal tyre or defective.The hardware simplicity of using a plurality of advantages of present technique to be embodied in reality is used is to following degree: need not professional Add-ons or other sensors as inner patch, just can under the situation that does not change tire itself, in any pneumatic tyre, use monitoring technology.Although do not need professional Add-ons, should not get rid of the extra tire hardware of use in the technology of the present invention.
[0042], is to be understood that in a single day those skilled in the art understand foregoing and just can propose correction, variation and equivalent arrangements to this embodiment at an easy rate although the present invention is described in detail by specific embodiments.Thereby the scope of the present disclosure is to illustrate rather than be implemented scheme by embodiment to limit, and the present invention does not get rid of and contained conspicuous for the ordinary skill in the art correction that the present invention is carried out, changes and/or augmented.
Claims (22)
1. apparatus surveillance of pneumatic tyre comprises:
The radar transceiver that has output terminal, the position of described radar transceiver are set to RF signal illuminated portion tire and receive the reflected signal that returns from tire, and are configured to the output terminal generation output signal of this radar transceiver at it; And
Signal processor, this signal processor have an input end and the output terminal with the coupling of radar transceiver output terminal;
Wherein said processor is set to carry out signal analysis according to the selected harmonic wave of the reflected signal of radar transceiver reception, and produce at its output terminal and to be used to represent the tire correlation parameter selected or unusual output signal, wherein said harmonic wave is based on the tire rotational speed.
2. apparatus surveillance of pneumatic tyre as claimed in claim 1, wherein said signal processor are set to carry out signal analysis according to the selected harmonic wave scope of the reflected signal of radar transceiver reception.
3. apparatus surveillance of pneumatic tyre as claimed in claim 2, wherein said signal processor are set to carry out signal analysis according to the average energy of the harmonic energy in selected harmonic wave scope.
4. apparatus surveillance of pneumatic tyre as claimed in claim 2, wherein said signal processor are set to carry out signal analysis according to the barycenter of the Harmonic Distribution in selected harmonic wave scope.
5. apparatus surveillance of pneumatic tyre as claimed in claim 3, wherein said signal processor are set to carry out signal analysis according to the barycenter of Harmonic Distribution in selected harmonic wave scope.
6. apparatus surveillance of pneumatic tyre as claimed in claim 2 is wherein according to selected tire correlation parameter or select the harmonic wave scope unusually.
7. apparatus surveillance of pneumatic tyre as claimed in claim 6, the scope that wherein tire correlation parameter or be wheel balance and location unusually, and selected harmonic wave scope is the from the 1st to the 2nd harmonic wave.
8. apparatus surveillance of pneumatic tyre as claimed in claim 6, wherein tire correlation parameter or be that the tread rings belt separates and uneven treadwear unusually, and selected harmonic wave scope is from the 3rd scope to the n harmonic wave, n is the first-harmonic about tread contour here.
9. apparatus surveillance of pneumatic tyre as claimed in claim 6, tire correlation parameter or be treadwear unusually wherein, and selected harmonic wave scope is the scope from n to the m harmonic wave, and n is the first-harmonic about tread contour here, and m is the higher hamonic wave of tread contour energy.
10. apparatus surveillance of pneumatic tyre as claimed in claim 1, wherein radar transceiver is the radar Doppler transceiver.
11. apparatus surveillance of pneumatic tyre as claimed in claim 10, wherein radar transceiver is Doppler's micropower impulse radar transceiver.
12. a method that is used to detect the tire correlation parameter may further comprise the steps:
With RF signal illuminated portion tire;
Reception is from the signal of illuminated tire reflection; With
The selected harmonic wave of the reflected signal that analysis receives is to detect selected tire correlation parameter, and wherein said harmonic wave is based on the tire rotational speed.
13. the method in the claim 12, wherein said analytical procedure comprises:
The harmonic wave scope of the reflected signal that selection is used to analyze; With
Analyze selected harmonic wave scope to detect the tire correlation parameter.
14. the method for claim 13, the step of wherein analyzing selected harmonic wave scope comprises the average energy of the harmonic energy of estimation in selected harmonic wave scope.
15. the method for claim 14, the step of wherein analyzing selected harmonic wave scope comprises the barycenter of the Harmonic Distribution of estimation in selected harmonic wave scope.
16. the method for claim 13, the step of wherein analyzing selected harmonic wave scope comprises the barycenter of estimation Harmonic Distribution in selected harmonic wave scope.
17. the method for claim 13 wherein according to the tire correlation parameter that will detect, is carried out the step of selecting the harmonic wave scope.
18. the method for claim 17, wherein selected tire correlation parameter is wheel balance and location, and selected harmonic wave scope is the scope between the 1st and the 2nd harmonic wave.
19. the method for claim 17, wherein selected tire correlation parameter are that the tread rings belt separates and inhomogeneous treadwear, and selected harmonic wave scope is from the 3rd scope to the n harmonic wave, n is the first-harmonic about tread contour here.
20. the method for claim 17, wherein selected tire correlation parameter is a treadwear, and selected harmonic wave scope is the scope from n to the m harmonic wave, and n is the first-harmonic about tread contour here, and m is the higher hamonic wave of tread contour energy.
21. the method for claim 12 is wherein carried out irradiation and receiving step with the radar Doppler transceiver.
22. the method for claim 21 is wherein carried out irradiation and receiving step with Doppler's micropower impulse radar transceiver.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| DE (1) | DE602004016810D1 (en) |
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| JP2019203831A (en) * | 2018-05-25 | 2019-11-28 | 住友ゴム工業株式会社 | Pneumatic tire, tire abrasion measuring method, tire abrasion measuring system, and sensor module |
| US10820474B2 (en) | 2018-10-11 | 2020-11-03 | Cnh Industrial Canada, Ltd. | System for estimating field conditions and associated methods for adjusting operating parameters of an agricultural machine based on estimated field conditions |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE602004016810D1 (en) | 2008-11-13 |
| EP1542035B1 (en) | 2008-10-01 |
| US7082819B2 (en) | 2006-08-01 |
| JP2005186929A (en) | 2005-07-14 |
| CN1627098A (en) | 2005-06-15 |
| JP5004417B2 (en) | 2012-08-22 |
| EP1542035A1 (en) | 2005-06-15 |
| US20050120787A1 (en) | 2005-06-09 |
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